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  <title>改变目录</title>
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 <body class="docs"><div id="layout">
  <div id="layout-content"><div id="function.chdir" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">chdir</h1>
  <p class="verinfo">(PHP 4, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">chdir</span> &mdash; <span class="dc-title">改变目录</span></p>

 </div>

 <div class="refsect1 description" id="refsect1-function.chdir-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>chdir</strong></span>
    ( <span class="methodparam"><span class="type">string</span> <code class="parameter">$directory</code></span>
   ) : <span class="type">bool</span></div>

  <p class="para rdfs-comment">
   将 PHP 的当前目录改为
   <code class="parameter">directory</code>。
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.chdir-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

    
     <dt>
<code class="parameter">directory</code></dt>

     <dd>

      <p class="para">
       新的当前目录
      </p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.chdir-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   成功时返回 <strong><code>TRUE</code></strong>， 或者在失败时返回 <strong><code>FALSE</code></strong>。
  </p>
 </div>


 <div class="refsect1 errors" id="refsect1-function.chdir-errors">
  <h3 class="title">错误／异常</h3>
  <p class="para">
   Throws an error of level <strong><code>E_WARNING</code></strong> on failure.
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-function.chdir-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-2746">
    <p><strong>Example #1 <span class="function"><strong>chdir()</strong></span> 例子</strong></p>
    <div class="example-contents">
<div class="phpcode"><pre><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /><br /></span><span style="color: #FF8000">//&nbsp;current&nbsp;directory<br /></span><span style="color: #007700">echo&nbsp;</span><span style="color: #0000BB">getcwd</span><span style="color: #007700">()&nbsp;.&nbsp;</span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">chdir</span><span style="color: #007700">(</span><span style="color: #DD0000">'public_html'</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">//&nbsp;current&nbsp;directory<br /></span><span style="color: #007700">echo&nbsp;</span><span style="color: #0000BB">getcwd</span><span style="color: #007700">()&nbsp;.&nbsp;</span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</pre></div>
    </div>

    <div class="example-contents"><p>以上例程的输出类似于：</p></div>
    <div class="example-contents screen">
<div class="cdata"><pre>
/home/vincent
/home/vincent/public_html
</pre></div>
    </div>
   </div>
  </p>
 </div>


 <div class="refsect1 notes" id="refsect1-function.chdir-notes">
  <h3 class="title">注释</h3>
  <blockquote class="note"><p><strong class="note">Note</strong>: <span class="simpara">当启用
<a href="features.safe_mode.html" class="link">安全模式</a>时，
PHP 会在执行脚本时检查被脚本操作的目录是否与被执行的脚本有相同的 UID（所有者）。</span></p></blockquote>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.chdir-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="getcwd.html" class="function" rel="rdfs-seeAlso">getcwd()</a> - 取得当前工作目录</span></li>
   </ul>
  </p>
 </div>

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